アドオン
ここで公開されている数千ものアドオンを試すには、無料の高速ウェブブラウザー Mozilla Firefox をダウンロードしましょう！
閉じる最も人気の拡張機能
DOM Inspector
要再起動
DOM Inspector is a tool that can be used to inspect and edit the live DOM of any web document or XUL application. The DOM can be navigated using a two-paned window displaying a variety of different views on the document and all nodes within.
ChatZilla
要再起動
A clean, easy to use and highly extensible Internet Relay Chat (IRC) client.
MinimizeToTray revived
JavaScript Debugger
要再起動
As of Firefox 33, Venkman *no longer works*, as the APIs which it needs have been removed.
Venkman is the code name for Mozilla's JavaScript Debugger. Venkman aimed to provide a powerful JavaScript debugging environment for Mozilla based browsers.
FireTray
要再起動
A system tray extension for Linux and Windows, allowing to set up custom icon, hiding to tray instead of closing, display the number of unread messages in mailing applications, and other features ...
FlashGot Mass Downloader
要再起動
Download all the links, movies and audio clips of a page at the maximum speed with a single click, using the most popular, lightweight and reliable external download managers.
Toolbar Buttons
Adds toolbar buttons to the customize toolbar window in several programs including Firefox, Thunderbird and SeaMonkey. Some of the buttons make commonly preformed actions quicker, others add new functionality.
Element Hiding Helper for Adblock Plus
テキスト広告と戦います！ Element Hiding Helper は簡単に要素の非表示ルールを作成できる、Adblock Plus 用の支援拡張機能です。
Dorando keyconfig
要再起動
A modified Dorando's addon to rebind keyboard shortcuts. It is designed to be a drop-in replacement, keeping your old settings. (See details for upgrade instructions.)
As of version 2016.2, Custom keys (using custom JavaScript) work again!
StartupMaster
Saved Password Editor
Disable Add-on Compatibility Checks
Reinstates the extensions.checkCompatibility preference without respect to the current application version.
ProfileSwitcher
要再起動
It adds some options to launch easily other profiles and the Profile Manager.
Image Zoom
User Agent Switcher
要再起動
The User Agent Switcher extension adds a menu and a toolbar button to switch the user agent of a browser.
Easiest YouTube Video Downloader
This Addon simply adds a dropdown button that lets you download YouTube Videos in various Formats. Download YouTube Videos in FLV, 3GP, MP3, MP4, 720p, 1080p in a single click.
Cookies Exterminator
Auto delete cookies, localStorage and IndexedDB objects as soon as they become unused
Minimize On Start and Close
要再起動
A remake of the MinimizeToTray-extension made to fit the Windows 7 taskbar. Instead of minimize the window to the tray it minimize it to the taskbar. It can minimize on startup, when the window is closed and/or when the esc key is pressed.
Complete YouTube Saver
要再起動
Download YouTube videos in various formats including 1080p, 4K etc (DASH formats). Convert audio track from videos to MP3 or WAV, or save audio in native format (Ogg, AAC/M4A, MP3, OPUS). Save YouTube page, video, comments and subtitles to one folder
Bluhell Firewall
Get a faster browsing experience by blocking nasty web resources using Bluhell Firewall, the lightweight Ad-Blocker and Tracking/Privacy Protector.
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